Patents by Inventor Qin Zhou

Qin Zhou has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Lever system for driving mirrors of a LiDAR transmitter
    Patent number: 11092801
    Abstract: A lever is used to rotate a microelectromechanical systems (MEMS) mirror. The lever can be used to provide more torque from a vertical comb drive. The MEMS mirror can be part of an array of micro mirrors used for beam steering a laser in a Light Detection and Ranging (LiDAR) system for an autonomous vehicle.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: August 17, 2021
    Assignee: Beijing Voyager Technology Co., Ltd.
    Inventors: Qin Zhou, Youmin Wang
  • Non-linear springs to unify the dynamic motion of individual elements in a micro-mirror array
    Patent number: 11085995
    Abstract: An array of micro mirrors is used to beam steer a laser for Light Detection and Ranging (LiDAR) applications. The array of micro mirrors are driven in a nonlinear motion to synchronize motion of the micro mirrors in the array.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: August 10, 2021
    Assignee: Beijing Voyager Technology Co., Ltd.
    Inventors: Qin Zhou, Youmin Wang
  • System, method and apparatuses for identifying load volatility of a power customer and a tangible computer readable medium
    Patent number: 11069009
    Abstract: The present disclosure relates to system, method and apparatuses for identifying load volatility of a power customary and a tangible computer readable medium therefor. In an embodiment of the present disclosure, the system comprises at least one processor; and at least one memory storing computer executable instructions. The at least one memory and the computer executable instructions are configured to, with the at least one processor, cause the system to determine boundary points for splitting a load curve of a power customer automatically, through performing density-based spatial clustering on data points of the load curve of the power customer; and detect tendency turning points of the load curve by means of the determined boundary points, so as to identify the load volatility of the power customer.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: July 20, 2021
    Assignee: ACCENTURE GLOBAL SERVICES LIMITED
    Inventors: Fang Hou, Qin Zhou, Ming Li
  • Non-linear springs to unify the dynamic motion of individual elements in a micro-mirror array
    Patent number: 11061201
    Abstract: An array of micro mirrors is used to beam steer a laser for Light Detection and Ranging (LiDAR) applications. The array of micro mirrors are driven in a nonlinear motion to synchronize motion of the micro mirrors in the array.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: July 13, 2021
    Assignee: Beijing Voyager Technology Co., Ltd.
    Inventors: Qin Zhou, Youmin Wang
  • CONVERTING DATABASE LANGUAGE STATEMENTS BETWEEN DIALECTS
    Publication number: 20210209098
    Abstract: A system receives a source database language statement according to a first dialect, determines a pattern of the source database language statement, the pattern comprising an abstract representation of the source database language statement, and checks whether the determined pattern is present in a cache of translations between patterns according to the first dialect and corresponding patterns according to a second dialect different from the first dialect. In response to the determined pattern being present in the cache of translations, the system converts, using a corresponding translation in the cache of translations, the source database language statement according to the first dialect to a respective target database language statement according to the second dialect.
    Type: Application
    Filed: June 15, 2018
    Publication date: July 8, 2021
    Inventors: LEI SHI, QIN ZHOU, BING GU, DONG-HUI ZHU, FENG YAN, WEN ZOU
  • FUEL CELL CATHODE CATALYST
    Publication number: 20210202957
    Abstract: A fuel cell catalyst for oxygen reduction reactions including Pt—Ni—Cu nanoparticles supported on nitrogen-doped mesoporous carbon (MPC) having enhanced activity and durability, and method of making said catalyst. The catalyst is synthesized by employing a solid state chemistry method, which involves thermally pretreating a N-doped MPC to remove moisture from the surface; impregnation of metal precursors on the N-doped MPC under vacuum condition; and reducing the metal precurors in a stream of CO and H2 gas mixture.
    Type: Application
    Filed: December 27, 2019
    Publication date: July 1, 2021
    Applicant: Toyota Motor Engineering and Manufacturing North America, Inc.
    Inventors: Li Qin Zhou, Kan Huang, Hongfei Jia, Xiaochen Shen, Zhenmeng Peng, Hisao Kato
  • MICROMACHINED MIRROR ASSEMBLY WITH PIEZOELECTRIC ACTUATOR
    Publication number: 20210199775
    Abstract: Embodiments of the disclosure provide a micromachined mirror assembly for controlling directions of optical signals in an optical sensing system. The micromachined mirror assembly includes a micro mirror and at least one piezoelectric actuator. The micro mirror is suspended over a substrate by at least one beam mechanically coupled to the micro mirror, and the at least one piezoelectric actuator is mechanically coupled to the at least one beam and is configured to drive the micro mirror via the at least one beam. The at least one piezoelectric actuator is configured to drive the micro mirror to tilt around a first axis based on a first electrical signal applied to the at least one piezoelectric actuator. The first electrical signal causes a piezoelectric material of the at least one piezoelectric actuator to expand in a first direction in parallel with the first axis.
    Type: Application
    Filed: December 31, 2019
    Publication date: July 1, 2021
    Applicant: Voyager (HK) Co., Ltd.
    Inventors: Youmin Wang, Yufeng Wang, Sergio Fabian Almeida Loya, Qin Zhou, Gary Li, George Lee, Bruce Sun
  • INTERMETALLIC L10-NiPtAg CATALYSTS FOR OXYGEN REDUCTION REACTION
    Publication number: 20210184227
    Abstract: An electrode catalyst for an oxygen reduction reaction including intermetallic L10-NiPtAg alloy nanoparticles having enhanced ORR activity and durability. The catalyst including intermetallic L10-NiPtAg alloy nanoparticles is synthesized by employing silver (Ag) as a dopant and annealing under specific conditions to form the intermetallic structure. In one example, the intermetallic L10-NiPtAg alloy nanoparticles are represented by the formula: NixPtyAgz wherein 0.4?x?0.6, 0.4?y?0.6, z?0.1.
    Type: Application
    Filed: December 16, 2019
    Publication date: June 17, 2021
    Applicant: Toyota Motor Engineering and Manufacturing North America, Inc.
    Inventors: Kecheng Wei, Tomoyuki Nagai, Li Qin Zhou, Hongfei Jia
  • MICROMACHINED MIRROR ASSEMBLY WITH ASYMMETRIC STRUCTURE
    Publication number: 20210165210
    Abstract: Embodiments of the disclosure provide a micromachined mirror assembly for controlling optical directions in an optical sensing system. The micromachined mirror assembly may include a micro mirror configured to direct an optical signal into a plurality of directions. The micromachined mirror assembly may also include at least one actuator coupled to the micro mirror and configured to drive the micro mirror to tilt around an axis. The micromachined mirror assembly may further include one or more objects attached to the micro mirror. The one or more objects may be asymmetrically disposed with respect to the axis to create an imbalanced state of the micro mirror when the micro mirror is not driven by the at least one actuator.
    Type: Application
    Filed: December 3, 2019
    Publication date: June 3, 2021
    Inventors: Youmin Wang, Yufeng Wang, Qin Zhou
  • RESONANT FREQUENCY TUNING OF MICROMACHINED MIRROR ASSEMBLY
    Publication number: 20210116701
    Abstract: Embodiments of the disclosure provide a micromachined mirror assembly. The micromachined mirror assembly includes a micro mirror, a first suspended beam, a second suspended beam, a first actuator, and a second actuator. The micro mirror is configured to tilt around an axis. The first suspended beam and second suspended beam each is mechanically coupled to the micro mirror along the axis. The first actuator is mechanically coupled to the first suspended beam and configured to apply a first torsional stress around the axis to the first suspended beam. The second actuator is mechanically coupled to the second suspended beam and configured to apply a second torsional stress around the axis to the second suspended beam. the first torsional stress and second torsional stress have a magnitude difference.
    Type: Application
    Filed: October 18, 2019
    Publication date: April 22, 2021
    Inventors: Sae Won Lee, Youmin Wang, Qin Zhou
  • MICROMACHINED MIRROR ASSEMBLY WITH PIEZOELECTRIC ACTUATOR
    Publication number: 20210116548
    Abstract: Embodiments of the disclosure provide a micromachined mirror assembly for controlling optical directions in an optical sensing system. The micromachined mirror assembly includes a micro mirror and at least one piezoelectric actuator. The micro mirror is suspended over a substrate by at least one beam mechanically coupled to the micro mirror, and the at least one piezoelectric actuator is mechanically coupled to the at least one beam and is configured to drive the micro mirror via the at least one beam. The at least one piezoelectric actuator is configured to drive the micro mirror to tilt along a first axis based on a first electrical signal received by the at least one piezoelectric actuator.
    Type: Application
    Filed: October 19, 2019
    Publication date: April 22, 2021
    Inventors: Youmin Wang, Yufeng Wang, Qin Zhou
  • RESONANT FREQUENCY TUNING OF MICROMACHINED MIRROR ASSEMBLY
    Publication number: 20210116702
    Abstract: Embodiments of the disclosure provide a micromachined mirror assembly. The micromachined mirror assembly includes a micro mirror configured to tilt around an axis and a first and a second torsion beam each having a first and a second end. The second end of the first torsion beam and the second end of the second torsion beam are mechanically coupled to the micro mirror along the axis. The micromachined mirror assembly also includes a first DC voltage applied to the first end of the first torsion beam and a second DC voltage, different from the first DC voltage, is applied to the first end of the second torsion beam.
    Type: Application
    Filed: October 18, 2019
    Publication date: April 22, 2021
    Inventors: Sae Won Lee, Youmin Wang, Qin Zhou
  • Service network maintenance analysis and control
    Patent number: 10979294
    Abstract: Modern day-to-day life depends on reliable operation of network devices in a wide range of service network such as an electric grid. An analysis and control system executes a complex technical analysis to determine maintenance optimizations for the service network. The system arrives at the optimizations after taking into consideration the maintenance tasks to be performed across a time-dependent network topology and service sensitivity of the network devices to service outage.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: April 13, 2021
    Assignee: ACCENTURE GLOBAL SOLUTIONS LIMITED
    Inventors: Ming Li, Jianhua Zhang, Zitong Song, Qin Zhou
  • Brownmillerite oxides for oxygen evolution catalyst
    Patent number: 10927465
    Abstract: An oxygen evolution catalyst of the formula: Sr2MCoO5 where M=Al, Ga wherein M is bonded with four oxygen atoms to form a tetrahedron. The catalyst is operated at a potential of less than 1.58 volts vs. RHE at a current density of 50 ?A/cm2 for a pH of 7-13. The catalyst is operated at a potential of less than 1.55 volts vs. RHE at a current density of 50 ?A/cm2 and a pH of 13. The oxygen evolution catalyst of the formula: Sr2GaCoO5 wherein the catalyst is operated at a potential of less than 1.53 volts vs. RHE at a current density of 50 ?A/cm2 and a pH of 7. The oxygen evolution catalyst of formula: Sr2GaCoO5 wherein the catalyst maintains a current within 94% after 300 minutes at a potential of 1.645 volts vs. RHE wherein the current is greater than 1 milliamp and a pH of 7.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: February 23, 2021
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Li Qin Zhou, Krishna Reddy Gunugunuri, Chen Ling, Hongfei Jia
  • Coupled and synchronous mirror elements in a LiDAR-based micro-mirror array
    Patent number: 10908409
    Abstract: Some embodiments include a MEMS apparatus configured to redirect light in a LiDAR system and includes a support frame and a plurality of mirror elements disposed in a linear array within the support frame including a first mirror element and a second mirror element. Each of the plurality of mirror elements can be rotatable on a rotational axis that is perpendicular to a line defined by the linear array of the plurality of mirror elements and bisects the corresponding mirror element into a first portion and a second portion. The apparatus can include a coupling element having a distal end physically coupled to a first portion of the first mirror element and a proximal end physically coupled to a second portion of the second mirror element such that a rotation of the first mirror element causes a synchronous and equal rotation of the second mirror element.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: February 2, 2021
    Assignee: Beijing Voyager Technology Co., Ltd.
    Inventors: Qin Zhou, Youmin Wang
  • Ultrasonic microphone and ultrasonic acoustic radio
    Patent number: 10890481
    Abstract: This disclosure provides systems, methods, and apparatus related to an ultrasonic microphone and an ultrasonic acoustic radio. In one aspect a system includes a transmitter and a receiver. The receiver comprises a membrane. The membrane comprises a single layer or multiple layers of a two-dimensional material. The receiver is operable to receive sound waves in a frequency range, with the frequency range being the ultrasonic frequency range.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: January 12, 2021
    Assignee: The Regents of the University of California
    Inventors: Qin Zhou, Alexander K. Zettl
  • System events in universal serial bus (USB) devices
    Patent number: 10884467
    Abstract: Techniques relating to communicating system events in universal serial bus (USB) power delivery (PD) devices are described. In an example, a USB PD controller receives a notification of a system event in a first device associated with the USB PD controller, the system event being based on one of a change in machine state of the first device and occurrence of a user interaction event in the first device. A PD protocol based message, indicative of the system event in the first device, is generated. The PD protocol based message provides for activation of a predefined profile setting in a second device, wherein the second device is to interface with the first device through the USB PD controller.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: January 5, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Hua Shao, Chun-Qin Zhou, Xiao-Dong Zhang
  • Methods for making oxygen reduction reaction catalysts formed of platinum alloy nanoparticles embedded in porous carbon
    Patent number: 10875015
    Abstract: Methods for making porous materials having metal alloy nanoparticles formed therein are described herein. By preparing a porous material and delivering the precursor solutions under vacuum, the metal precursors can be uniformly embedded within the pores of the porous material. Once absorption is complete, the porous material can be heated in the presence of one or more functional gases to reduce the metal precursors to metal alloy nanoparticles, and embed the metal alloy nanoparticles inside of the pores. As such, the metal alloy nanoparticles can be formed within the pores, while avoiding surface wetting and absorption problems which can occur with small pores.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: December 29, 2020
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki Kaisha, The University of Akron
    Inventors: Li Qin Zhou, Kan Huang, Tomoyuki Nagai, Hongfei Jia, Hisao Kato, Xiaochen Shen, Zhenmeng Peng
  • ELECTROSTATIC GRAPHENE SPEAKER
    Publication number: 20200374635
    Abstract: This disclosure provides systems, methods, and device associated with an electrostatically driven graphene speaker. In one aspect, the device includes a graphene membrane having a diameter of about 3 millimeters to about 11 millimeters, and a first electrode proximate a first side of the graphene membrane, the first electrode being electrically conductive. The device is a microphone or a loudspeaker.
    Type: Application
    Filed: August 14, 2020
    Publication date: November 26, 2020
    Inventors: Qin Zhou, Alexander K. Zettl
  • MEMS MIRROR DEVICE HAVING A STABILIZATION RING AND REDUCED STATIC REFLECTION
    Publication number: 20200363508
    Abstract: Methods and systems for using a MEMS mirror for steering a LiDAR beam and for minimizing statically emitted light from a LiDAR system are disclosed. A LiDAR system includes a light source that emits a light beam directed at a MEMS device. The MEMS device includes a manipulable mirror that reflects the emitted light beam in a scanning pattern. The MEMS device also includes a stabilization ring positioned adjacent to and at least partially surrounding the mirror. An attenuation layer is disposed on a top surface of the stabilization ring and is configured to attenuate light reflected by the stabilization ring.
    Type: Application
    Filed: May 13, 2019
    Publication date: November 19, 2020
    Inventors: Sae Won Lee, Youmin Wang, Qin Zhou